Research-context information only. Semax is a research peptide approved in Russia as a finished pharmaceutical product but not FDA-approved in the United States. Protocols, doses, and reactions reported below come from published research (mostly Russian) and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.
The buying problem is unique to semax: most users administer it intranasally, so pre-mixed nasal sprays are the dominant format. There are also two structurally distinct variants — semax (free peptide) and N-acetyl semax (acetylated for longer half-life) — that vendors sometimes confuse in product listings.
This guide covers documented per-mg pricing, format selection, COA verification, and red flags. For dosing context, see the semax dosing guide.
This is not a ranked vendor list — for that, see our Best Semax Vendors comparison.
Understanding Semax Pricing
Semax ships in three formats:
Lyophilized vials (5-30mg) — User reconstitutes into nasal spray bottle. Cheapest per-mg.
Pre-mixed nasal sprays (30mg/3mL) — Most-cited format for convenience.
N-acetyl semax variants — Slight premium for longer half-life.
Current Market Pricing (2026)
Format & Size
Typical Price Range
Price Per mg
Best For
5mg lyophilized vial
$35-80
$7-16/mg
Tolerance testing
30mg pre-mixed nasal spray (1%)
$40-100
$1.33-3.33/mg
Standard intranasal use — best all-around
30mg N-acetyl semax nasal spray
$50-130
$1.67-4.33/mg
Long half-life users
30mg × 3 (kit)
$100-250
$1.10-2.78/mg
Long protocols
The pattern: Pre-mixed nasal sprays are dramatically cheaper per-mg than lyophilized vials, but only because vendors sell larger quantities (30mg) in spray form vs smaller vials (5mg). Both formats use the same underlying peptide.
Cost Per Month at Common Doses
Daily Dose
Monthly Mass
Monthly Cost (5mg vial)
Monthly Cost (30mg nasal spray)
200 mcg/day
6 mg
$42-96
$8-20
400 mcg/day (mid-range)
12 mg
$84-192
$16-40
600 mcg/day
18 mg
$126-288
$24-60
Key insight: Pre-mixed nasal sprays are 4-7x cheaper per dose than lyophilized vials at the same daily dose. This is unusual — most peptides have lyophilized as the cheaper format. For semax, the spray dominance is driven by direct manufacturer-to-user spray packaging at high volume.
For current vendor-specific pricing, see our Best Semax Vendors comparison.
Cheapest recommended vendor: Ion Peptide's 10mg vial at $32.90 ($3.29/mg) — lowest $/mg from a recommended vendor. Glacier Aminos matches the dose at $40.99 ($4.10/mg). Compare current vendors ↓
How to Verify Semax Quality
Semax is a 7-residue peptide (Met-Glu-His-Phe-Pro-Gly-Pro) — straightforward synthesis without unusual amino acids. The verification challenge is variant clarity (semax vs N-acetyl semax) and ensuring nasal sprays haven't degraded during storage.
What a COA Should Include
Identity Confirmation
Mass spectrometry confirming 813.92 Da for semax or 855.96 Da for N-acetyl semax
Common community pattern: Pre-mixed nasal sprays are the most-purchased format due to convenience and dramatically lower per-mg cost. Lyophilized vials are reserved for users who want flexibility in concentration or who plan to travel internationally.
N-Acetyl Semax — When the Variant Matters
N-acetyl semax (also called NA-Semax-Amidate or NASS) is the same 7-residue sequence with N-terminal acetylation. The acetylation:
Extends serum half-life from ~30 minutes (semax) to several hours (N-acetyl)
Increases CNS bioavailability through reduced peptidase degradation
Costs roughly 20-40% more per mg than standard semax
For users who prefer once-daily dosing rather than 2-3 daily nasal applications, N-acetyl semax is the documented variant. For users following published Russian clinical protocols (which used standard semax), the original variant is more research-backed.
Vial/Bottle Size by Protocol
Tolerance testing context:
A 5mg lyophilized vial is the smallest unit cited for testing tolerance
25 days at 200mcg/day
Standard 200-400mcg/day intranasal protocol:
30mg pre-mixed nasal spray — 75-150 days supply at standard doses
The most-cited format in vendor sales data
1 bottle per 2-5 months of use
Higher doses (600+ mcg/day):
30mg × 3 kit drops cost to $1.10-2.78/mg
Or N-acetyl semax for once-daily dosing convenience
Vendor Evaluation Methodology
When comparing semax vendors:
Price Competitiveness (40%)
Normalize to cost per milligram. Pre-mixed nasal sprays at $40-100 for 30mg ($1.33-3.33/mg) score higher than 5mg lyophilized at $35-80 ($7-16/mg) for users who don't need flexibility.
COA & Testing (30%)
Third-party labs (Janoshik, MZ Biolabs, Colmaric)
Recent (within 6 months — especially important for nasal sprays)
Verifiable task number
Mass spec confirming variant (semax vs N-acetyl)
Reputation (30%)
Community feedback, shipping reliability, customer service, multi-year track record.
Shipping and Storage
Order Arrival
Lyophilized vials:
Vial integrity — no cracks, intact seal
Powder appearance — solid cake or loose powder
Labeling — batch/lot, mg content, "for research use only"
Pre-mixed nasal sprays:
Bottle integrity — intact tamper seal, working spray pump
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Frequently Asked Questions
Is semax legal to buy?
Semax is sold as a research peptide labeled 'not for human consumption.' It is approved as a finished pharmaceutical product in Russia (used in stroke recovery and as a nootropic) but is not FDA-approved in the United States. Purchasing research peptides is legal in most US jurisdictions.
How much does semax cost per month?
Community intranasal protocols use 200-600mcg/day. Monthly mass at 400mcg/day is 12mg. Research-vendor 5mg vials cost $35-80 (lyophilized) or 30mg pre-mixed nasal sprays cost $40-100. Monthly cost ranges from $35-100 depending on format.
What format should I buy — lyophilized vial or nasal spray?
Pre-mixed nasal sprays are the most-cited format because intranasal is the documented administration route in Russian clinical practice. Lyophilized vials are cheaper per-mg but require user reconstitution and a dedicated nasal spray bottle. N-acetyl semax variants (more stable, longer half-life) are also available at slight premium.
What purity should I look for in semax?
Third-party HPLC at 98%+ purity, plus mass spec confirming 813.92 Da for semax (Met-Glu-His-Phe-Pro-Gly-Pro). N-acetyl semax has a different mass (855.96 Da). Make sure the COA states which variant is in the bottle — they're often confused in product listings.
Why is semax priced low compared to other peptides?
Semax is a 7-residue peptide with no unusual amino acids — synthesis is straightforward. Plus the established Russian pharmaceutical market created decades of manufacturing experience. Per-mg pricing is typically $7-16/mg vs $20-40/mg for newer or more complex peptides.
Can I buy semax from a US pharmacy?
No. Semax is approved only in Russia as a finished pharmaceutical product. Research vendors are the only documented commercial source in the US.
This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.
